Question

question which angle number represents an angle vertical to ∠fhc?

Explanation:

Step1: Recall vertical - angles definition

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Identify intersecting lines

Lines $EF$ and $CD$ intersect at point $H$. $\angle FHC$ and $\angle EHD$ are vertical - angles because they are opposite each other at the intersection of lines $EF$ and $CD$.

Answer:

$\angle EHD$